Security monitoring system



FIG. 1 is a front perspective view of a security monitoring system showing the new design.

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right-side elevation view thereof;

FIG. 5 is a left-side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines object portions of the security monitoring system in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for a security monitoring system, as shown and described. 